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CBSE Class 7 Answered

the ages of A and B are in ratio 4:3. After 6 years, there ages will be in ratio 11:9. A's present age is?
Asked by annusurana1691 | 29 Oct, 2021, 08:24: PM
answered-by-expert Expert Answer
 
Let the age of A be 4x and age of B is 3x.
According to the condition, we get
begin mathsize 16px style fraction numerator 4 straight x plus 6 over denominator 3 straight x plus 6 end fraction equals 11 over 9 rightwards double arrow 9 open parentheses 4 straight x plus 6 close parentheses equals 11 open parentheses 3 straight x plus 6 close parentheses rightwards double arrow 36 straight x space plus space 54 space equals space 33 straight x space plus space 66 rightwards double arrow 3 straight x space equals space 12 rightwards double arrow space space straight x space equals space 4 end style
Therefore, the age of A be 4x is 4(4) = 16 years and age of B is 3x=3(4) = 12 years.
Answered by Yasmeen Khan | 30 Oct, 2021, 10:39: PM

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